What I noticed is that someone can be very addicted without his family knowing he is addicted to gambling, that is where the problem is, but this can easily be known for someone that knows his husband or children very well, the most common sign is when the husband or child will look at his phone or laptop and get moody from happy moment, if this occur frequently, it should have been known that online gambling is what that is affect the person. What the family can do is to be supportive, monitor the person and even very good to seek for medical intervention which will be very effective.
As a child, I actually felt quite embarrassed when my parent found out that I had become addicted to gambling. Despite the fact that sometime I can spend around $50-$100 a month on gambling, but I really don't want my parent to know about it. Gambling is an activity that is very synonymous with a bad habit in my country because the majority of us are Muslim. Gambling is prohibited in our religion and country, so I really had to hide it from my parent.
So I don't think that discussing gambling addiction with my parent is the best option for me to do. They would probably be very angry if they found out about my habit, and so far I won't tell them about it.